These charts are identical to the ones that Rearz and its official retailers use! You can reference them to find out just what makes each diaper unique, as well as easily discover what sizing best suits you. This is the most up-to-date information at this time. If you are having trouble viewing the guide you can also view it here. There are 5 pages to this guide so if you are only able to see the first page, please download a copy for your viewing as your browser does not support viewing the PDF.